The coil is waterproof but the control box and meter isn't, if you put the coil under the water make sure not to raise the coil above the control box until your sure there isn't water in the shaft. HH
Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them. New Garrett Ca